Lepidoptera (/ Ë l É p Éª Ë d É p t Ér É / lep-i-DOP-tÉr-É) is an order of insects that includes butterflies and moths (both are called lepidopterans). About 180,000 species of the Lepidoptera are described, in 126 families and 46 superfamilies, 10% of the total described species of living organisms.
Skin Tension Lines and how to get it. 1  Skin Tension Lines (STLs) are series of lines based on the direction of tension as this relaxed skin tension lines run perpendicular to the underlying muscles contraction. For best results and aesthetic outcome, place skin incisions along skin tension lines.
1 In the lower part of the back arising from the ilium, sacrum and lumbar spines is the erector spinae muscle (467/N168). 2  It has been divided and subdivided by anatomists, but functionally is one muscle mass causing extension of the vertebral column. Fascia separates true back muscles from appendicular muscles. 2  True back muscles, developed from the epaxial division of the myotome, are segmentally innnervated by dorsal rami of spinal nerves. 3  In the neck, the splenius muscle (467/N167) is the most superficial of the true back muscles (just deep to trapezius).